package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * 套餐业务实现
 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetMealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);

        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }


    /**
     * 新增菜品
     * @param setmealDTO
     */
    @Override
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();


        BeanUtils.copyProperties(setmealDTO,setmeal);

        //保存套餐
        setmealMapper.insert(setmeal);
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if(setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealId);
            });
        }

        //保存套餐中的菜
        setmealDishMapper.insertBatch(setmealDishes);

    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {

        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> page = setmealMapper.pageQuery();


        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    public void update(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改套餐
        setmealMapper.update(setmeal);

        //修改套餐关联的菜品
        Long setmealId = setmeal.getId();
        //先删除套餐关联的所有菜品
        setmealDishMapper.deleteBySetmealId(setmealId);

        //再插入新的菜品数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 根据id查询套餐
     * @param setmealId
     * @return
     */
    @Override
    public SetmealVO getById(Long setmealId) {

        //查套餐数据
        SetmealVO setmealVO = setmealMapper.getById(setmealId);
        //查套餐关联的菜品数据
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(setmealId);

        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 套餐起售，停售
     * @param status
     * @param id
     */
    @Override
    public void status(Integer status, Long id) {
        //判断要起售的套餐中是否包含未起售的菜品
        if(status == StatusConstant.ENABLE){
            //将菜品id查出来
            List<Long> dishIds = setmealDishMapper.getDishIdBySetmealId(id);
            //查看菜品的状态
            for(Long dishId : dishIds){
                Integer dstatus = dishMapper.getById(dishId).getStatus();
                if(dstatus == StatusConstant.DISABLE){
                    throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            }

        }else {
            Setmeal setmeal = Setmeal.builder()
                    .id(id)
                    .status(status)
                    .build();

            setmealMapper.update(setmeal);
        }


    }

    /**
     * 根据id删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteById(List<Long> ids) {
        //判断当前套餐能否被删除，起售中的不能删除
        for(Long id : ids){
            SetmealVO setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //删除套餐表数据
        setmealMapper.deleteBatch(ids);

        //删除套餐表关联的菜品表数据
        setmealDishMapper.deleteBySetmealIds(ids);

    }
}
